Groove Weld Strength
CJP / PJP groove-weld shear capacity on the effective throat (ASD / LRFD).
Example
You enter
- Weld type PJP
- Effective throat (in, PJP) 0.25
- Weld length (in) 6
- Electrode (FEXX) E70
- Method LRFD
You get
- Effective throat / unit strength 0.25
- Shear capacity 47250
Checked against published worked examples from: AWS D1.1 / AISC 360 §J2 Table J2.5 (by name).
Details, formula, and sources
ScopeWith the CJP base-metal note and utilization (AWS D1.1 / AISC 360 §J2).
Formula or tableEffective throat: CJP = thinner connected part thickness, PJP = WPS effective throat. PJP weld-metal shear (AISC Table J2.5) Fnw = 0.60*FEXX; ASD allowable 0.30*FEXX, LRFD design 0.75*0.60*FEXX. CJP shear is controlled by the base metal (J4.2): the smaller of 0.60 Fy (phi 1.00, Omega 1.50) and 0.60 Fu (phi 0.75, Omega 2.00). capacity = stress * throat * length.
Source and editionGroove weld (CJP / PJP) shear capacity - the AISC 360 Table J2.5 weld-metal shear strength 0.60*FEXX on the PJP effective throat, and the J4.2 base-metal shear for CJP - per AWS D1.1 Structural Welding Code and AISC 360 §J2, by name; first-principles.
Free accessFirst-principles AISC J2 shear. A CJP weld with matching filler develops the base metal in tension/compression; the PJP effective throat is read off the qualified WPS. The WPS, weld inspector, and engineer of record govern.
What governsEstimate. AHJ and licensed structural engineer govern.
API field namesweld_type, effective_throat_in, length_in, electrode, method, throat_in, capacity_lb
- Effective throat CJP uses the thinner part thickness; PJP uses the WPS effective throat (groove depth less the AWS Table 3.1 reduction); user-suppliedAWS D1.1 Table 3.1